if(navigator.appVersion.charAt(0) >= "3"){

img = new Array();
img[0] = new Image; img[0].src = "../images/common/m1.gif";
img[1] = new Image; img[1].src = "../images/common/m1_o.jpg";
img[2] = new Image; img[2].src = "../images/common/m2.gif";
img[3] = new Image; img[3].src = "../images/common/m2_o.jpg";
img[4] = new Image; img[4].src = "../images/common/m3.gif";
img[5] = new Image; img[5].src = "../images/common/m3_o.jpg";
img[6] = new Image; img[6].src = "../images/common/m4.gif";
img[7] = new Image; img[7].src = "../images/common/m4_o.jpg";
img[8] = new Image; img[8].src = "../images/common/m5.gif";
img[9] = new Image; img[9].src = "../images/common/m5_o.jpg";
img[10] = new Image; img[10].src = "../images/common/m6.gif";
img[11] = new Image; img[11].src = "../images/common/m6_o.jpg";
img[12] = new Image; img[12].src = "../images/common/m7.gif";
img[13] = new Image; img[13].src = "../images/common/m7_o.jpg";
img[14] = new Image; img[14].src = "../images/common/m8.gif";
img[15] = new Image; img[15].src = "../images/common/m8_o.jpg";
img[16] = new Image; img[16].src = "../images/common/m9.gif";
img[17] = new Image; img[17].src = "../images/common/m9_o.jpg";
img[18] = new Image; img[18].src = "../images/common/m10.gif";
img[19] = new Image; img[19].src = "../images/common/m10_o.jpg";
img[20] = new Image; img[20].src = "../images/common/m11.gif";
img[21] = new Image; img[21].src = "../images/common/m11_o.jpg";
}
function chg_img(a,b){
if(navigator.appVersion.charAt(0) >= "3"){
 document.images[a].src=img[b].src;
 }
}